If you’re all the reports came back normal then it could be panic or anxiety
disorder that you have faced during last event and currently experiencing. Cause of such panic
disorder mostly remain unknown but in this disorder you may feel symptoms like shortness of breath, feeling of choking, pain in the chest, nausea, stomach ache, feeling dizzy, tingling or numbness, chills or hot flashes, bounding heartbeat or fast heart rate, sweating, shaking etc. even without any underlying disorder.